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Khan, MH, Das, A, Khan, TI, Li, Z and Kotadia, HR (2025) Microstructural modification in an Al-Mg-Si (6082) alloy with high Fe content using inoculation and/or high-intensity ultrasonication. Journal of Alloys and Compounds, 1012. ISSN 0925-8388
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Microstructural modification in an Al-Mg-Si (6082) alloy with high Fe content using inoculation and or high-intensity ultrasonication.pdf - Published Version Available under License Creative Commons Attribution. Download (12MB) | Preview |
Abstract
In this study, the effects of solute Ti, chemical grain refiner (GR), and ultrasonication (UT) on the solidification behaviour and microstructure of a 6xxx (Al-1.0Mg-1.0Si) alloy with 1.0 wt% Fe impurity were examined. Primary-Al grains and eutectic Fe-intermetallic compounds (Fe-IMCs), predominantly α−Al8Fe2Si/β−Al9Fe2Si2, were identified as the major phases through thermodynamic prediction and microstructural observation. The results show that UT treatment produced the finest and most uniform microstructure, improving both grain refinement and Fe-IMC distribution, particularly compared to chemical methods. UT, when combined with GR, enhanced TiB2 dispersion and improved the nucleation of both Al grains and Fe-IMCs, leading to better refinement of the Fe-IMCs. Chemical inoculation also showed some effect, but UT consistently displayed finer, more uniform microstructures, and less aggregation of TiB2 particles. Although TiB2 particles appear to help nucleation of Fe-IMCs, refinement and distribution of the IMCs was primarily contributed by the size and distribution of intergranular liquid pockets, and consequently, the refinement of the Al-grain structure. Overall, the study highlights that UT, in combination with GR and TiB2, significantly improves the microstructure and controls Fe-IMC formation in high Fe 6xxx alloys, offering a promising approach for refining Al-Mg-Si alloys with high Fe content.
| Item Type: | Article |
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| Uncontrolled Keywords: | 0204 Condensed Matter Physics; 0912 Materials Engineering; 0914 Resources Engineering and Extractive Metallurgy; Materials |
| Subjects: | T Technology > TA Engineering (General). Civil engineering (General) |
| Divisions: | Engineering |
| Publisher: | Elsevier |
| SWORD Depositor: | A Symplectic |
| Date Deposited: | 27 Jan 2025 11:10 |
| Last Modified: | 27 Jan 2025 11:15 |
| DOI or ID number: | 10.1016/j.jallcom.2025.178500 |
| URI: | https://researchonline.ljmu.ac.uk/id/eprint/25413 |
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